mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
88 lines
2.1 KiB
C++
88 lines
2.1 KiB
C++
/* Limit hook.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <bitset>
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#include <cstring>
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#include <villas/hook.hpp>
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#include <villas/node/exceptions.hpp>
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#include <villas/sample.hpp>
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#include <villas/signal.hpp>
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namespace villas {
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namespace node {
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class LimitValueHook : public MultiSignalHook {
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protected:
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unsigned offset;
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float min, max;
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public:
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LimitValueHook(Path *p, Node *n, int fl, int prio, bool en = true)
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: MultiSignalHook(p, n, fl, prio, en), offset(0), min(0), max(0) {}
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virtual void parse(json_t *json) {
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int ret;
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json_error_t err;
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assert(state != State::STARTED);
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MultiSignalHook::parse(json);
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ret = json_unpack_ex(json, &err, 0, "{ s: f, s: f }", "min", &min, "max",
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&max);
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if (ret)
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throw ConfigError(json, err, "node-config-hook-average");
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state = State::PARSED;
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}
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virtual Hook::Reason process(struct Sample *smp) {
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assert(state == State::STARTED);
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for (auto index : signalIndices) {
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switch (sample_format(smp, index)) {
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case SignalType::INTEGER:
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if (smp->data[index].i > max)
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smp->data[index].i = max;
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if (smp->data[index].i < min)
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smp->data[index].i = min;
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break;
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case SignalType::FLOAT:
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if (smp->data[index].f > max)
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smp->data[index].f = max;
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if (smp->data[index].f < min)
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smp->data[index].f = min;
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break;
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case SignalType::INVALID:
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case SignalType::COMPLEX:
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case SignalType::BOOLEAN:
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return Hook::Reason::ERROR; // not supported
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}
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}
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return Reason::OK;
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}
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};
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// Register hook
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static char n[] = "limit_value";
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static char d[] = "Limit signal values";
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static HookPlugin<LimitValueHook, n, d,
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(int)Hook::Flags::PATH | (int)Hook::Flags::NODE_READ |
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(int)Hook::Flags::NODE_WRITE>
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p;
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} // namespace node
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} // namespace villas
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